<!--  -->
<template>
  <div class="">
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card>
      <!-- 添加角色按钮 -->
      <el-row>
        <el-col>
          <el-button type="primary" @click="AddRoleDialogVisible=true">添加角色</el-button>
        </el-col>
      </el-row>
      <!-- 角色列表区 -->
      <el-table :data="rolesList" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
           <el-row :class="['bdbottom', k1 === 0 ? 'bdtop' : '', 'vcenter']" v-for="(item1,k1) in scope.row.children" :key="k1">
             <!-- 渲染一级权限 -->
             <el-col :span="5">
               <el-tag closable  @close="removeRightById(scope.row, item1.id)">
                 {{item1.authName}}
               </el-tag>
               <i class="el-icon-caret-right"></i>
             </el-col>
           <!-- 渲染二级和三级权限 -->
            <el-col :span="19">
              <el-row>
                <!-- 通过for循环 渲染二级权限 -->
                <el-row
                  :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']"
                  v-for="(item2, i2) in item1.children"
                  :key="item2.id">
                <el-col :span="6">
                  <el-tag type="success" closable  @close="removeRightById(scope.row, item2.id)">
                    {{item2.authName}}
                    <i class="el-icon-caret-right"></i>
                    </el-tag>
                </el-col>
                <el-col :span="18">
                  <el-tag v-for="(item3, i3) in item2.children" :key="i3" closable type="warning" @close="removeRightById(scope.row, item3.id)">
                      {{item3.authName}}
                  </el-tag>
                </el-col>
                </el-row>
              </el-row>
            </el-col>
           </el-row>
          </template>
        </el-table-column>
        <el-table-column type="index" label="#"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row.id)">编辑</el-button>
            <el-button type="danger" icon="el-icon-delete" size="mini" @click="removeRoleById(scope.row.id)">删除</el-button>
            <el-button type="warning" icon="el-icon-setting" size="mini" @click="showSetRightDialog(scope.row)">分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
      <!-- 分配权限 对话框 -->
      <el-dialog title="分配权限" :visible.sync="setRightDialogVisible" width="50%" @close="setRightDialogClosed">
        <!-- tree树形控件 -->
        <el-tree :data="rightslist" :props="treeProps" show-checkbox
        node-key="id" default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>
        <span slot="footer" class="dialog-footer">
          <el-button @click="setRightDialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="allotRights">确 定</el-button>
        </span>
      </el-dialog>
    </el-card>
  </div>
</template>

<script>
export default {
  data() {
    return {
      rolesList:[],  // 所有角色列表
      // 控制分配权限对话框的显示与隐藏
      setRightDialogVisible: false,
      // 所有权限的数据
      rightslist: [],
      // 当前即将分配权限的角色id
      roleId: '',
      // 默认选中的节点Id值数组
      defKeys: [],
      //属性控件的属性绑定对象
      treeProps:{
        children:"children",  //父子嵌套关联的属性
        label:"authName" //指定看到的是哪个属性
      }
    }
  },
  //创建完成
  created() {
      this.getRolesList()
  },
  //方法集合
  methods: {
    //获取所以角色列表
      async getRolesList () {
        const { data: res } = await this.$http.get('roles')
        if (res.meta.status !== 200) {
          return this.$message.error('获取角色列表失败！')
        }
        this.rolesList = res.data
      },
      //根据id删除对应的权限
      async removeRightById (role, rightId) {
        // 弹框提示 删除
        const confirmResult = await this.$confirm(
          '此操作将永久删除该权限, 是否继续?',
          '提示',
          {
            confirmButtonText: '确定',
            cancelButtonText: '取消',
            type: 'warning'
          }
        ).catch(err => err)
        // 点击确定 返回值为：confirm 点击取消 返回值为： cancel
        if (confirmResult !== 'confirm') {
          this.$message.info('已取消权限删除')
        }
        const { data: res } = await this.$http.delete(
          `roles/${role.id}/rights/${rightId}`
        )
        if (res.meta.status !== 200) {
          return this.$message.error('删除权限失败！')
        }
        
        // this.getRolesList()  //不建议使用，会刷新列表体验不好
        // 完美做法，删除接口返回的data赋值给页面
        role.children = res.data
      },
     // 删除角色
    async removeRoleById (id) {
      const confirmResult = await this.$confirm(
        '此操作将永久删除该角色, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }
      ).catch(err => err)
      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除')
      }
      const { data: res } = await this.$http.delete('roles/' + id)
      if (res.meta.status !== 200) return this.$message.error('删除角色失败！')
      this.$message.success('删除用户成功！')
      this.getRolesList()
    },
    //展示分配权限的对话框
    async showSetRightDialog(role){
      this.roleId = role.id//保存id后面分配角色接口用
      // 获取所有权限的数据
      const { data: res } = await this.$http.get('rights/tree')

      if (res.meta.status !== 200) {
        return this.$message.error('获取权限数据失败！')
      }

      // 把获取到的权限数据保存到 data 中
      this.rightslist = res.data
      console.log(this.rightslist)
      // 递归获取3级节点的id
      this.getLeafKeys(role,this.defKeys)
      this.setRightDialogVisible = true
    },
    //通过递归的方式获取角色下的三级id，保存到defkeys数组
    getLeafKeys(node,arr){
      //如果没有children属性就是第三级
      if(!node.children){
        return arr.push(node.id)
      }
      node.children.forEach(item => {
        this.getLeafKeys(item,arr)
      });
    },
    // 监听分配权限对话框的关闭事件
    setRightDialogClosed() {
      this.defKeys = []
    },
    //点击确定按钮为角色分配权限
    async allotRights(){
      //getCheckedKeys 全选中key节点数组 getHalfCheckedKeys 半选
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        this.$refs.treeRef.getHalfCheckedKeys()
      ]
      console.log('keys',keys);
      const idStr = keys.join(",")
      const { data: res } = await this.$http.post(
        `roles/${this.roleId}/rights`,
        { rids: idStr }
      )
      if (res.meta.status !== 200) {
        return this.$message.error('分配权限失败！')
      }
      this.$message.success('分配权限成功！')
      this.getRolesList()
      this.setRightDialogVisible = false
    }
  }
}
</script>
<style lang='less' scoped>
  .el-tag{
    margin: 7px;
  }
  .bdtop {
    border-top: 1px solid #eee;
  }
  .bdbottom {
    border-bottom: 1px solid #eee;
  }
</style>